/*
 * Copyright (c) 2013-2015 Freescale Semiconductor, Inc.
 * All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
#include "bootloader_common.h"
#include "crc/crc32.h"
#include "utilities/fsl_assert.h"

#include "fsl_device_registers.h"
#include "utilities/fsl_rtos_abstraction.h"

#if FSL_FEATURE_SOC_CRC_COUNT && !defined(BL_TARGET_RAM)
#if !BL_DEVICE_IS_LPC_SERIES
#include "fsl_crc.h"
#else // BL_DEVICE_IS_LPC_SERIES
#include "lpc_crc/fsl_crc.h"
#endif // !BL_DEVICE_IS_LPC_SERIES

/* Table of base addresses for crc instances. */
static CRC_Type *const g_crcBase[1] = CRC_BASE_PTRS;

// initialize the members of the allocated crc32_data_t struct
void crc32_init(crc32_data_t *crc32Config)
{
    assert(crc32Config);

    crc32Config->currentCrc = 0xffffffffU;
    crc32Config->byteCountCrc = 0;
}

// "running" crc32 calculation
void crc32_update(crc32_data_t *crc32Config, const uint8_t *src, uint32_t lengthInBytes)
{
    assert(crc32Config);
    assert(src);

    crc_config_t crcUserConfigPtr;

    CRC_GetDefaultConfig(&crcUserConfigPtr);

#if !BL_DEVICE_IS_LPC_SERIES
    crcUserConfigPtr.crcBits = kCrcBits32;
    crcUserConfigPtr.seed = crc32Config->currentCrc;
    crcUserConfigPtr.polynomial = 0x04c11db7U;
    crcUserConfigPtr.complementChecksum = false;
    crcUserConfigPtr.reflectIn = false;
    crcUserConfigPtr.reflectOut = false;
#else // BL_DEVICE_IS_LPC_SERIES
    crcUserConfigPtr.seed = crc32Config->currentCrc;
    crcUserConfigPtr.polynomial = kCRC_Polynomial_CRC_32;
    crcUserConfigPtr.reverseIn = false;
    crcUserConfigPtr.reverseOut = false;
    crcUserConfigPtr.complementIn = false;
    crcUserConfigPtr.complementOut = false;
#endif // !BL_DEVICE_IS_LPC_SERIES

    // Init CRC module and then run it
    //! Note: We must init CRC module here, As we may seperate one crc calculation into several times
    //! Note: It is better to use lock to ensure the integrity of current updating operation of crc calculation
    //        in case crc module is shared by multiple crc updating requests at the same time
    if (lengthInBytes)
    {
        lock_acquire();
        CRC_Init(g_crcBase[0], &crcUserConfigPtr);
        CRC_WriteData(g_crcBase[0], src, lengthInBytes);
        crcUserConfigPtr.seed = CRC_Get32bitResult(g_crcBase[0]);
        lock_release();
    }

    crc32Config->currentCrc = crcUserConfigPtr.seed;
    crc32Config->byteCountCrc += lengthInBytes;
}

// finalize the crc32 calculation for non-word-aligned counts
void crc32_finalize(crc32_data_t *crc32Config, uint32_t *hash)
{
    assert(crc32Config);
    assert(hash);

    uint32_t extraBytes = crc32Config->byteCountCrc % 4;

    // pad with zeroes
    if (extraBytes)
    {
        uint8_t temp[3] = { 0, 0, 0 };
        crc32_update(crc32Config, temp, 4 - extraBytes);
    }

    *hash = crc32Config->currentCrc;

    // De-init CRC module when we complete a full crc calculation
    CRC_Deinit(g_crcBase[0]);
}
#else

////////////////////////////////////////////////////////////////////////////////
// Variables
////////////////////////////////////////////////////////////////////////////////

//! Table of CRC-32's of all single byte values. The values in
//! this table are those used in the Ethernet CRC algorithm.
static const uint32_t s_crc32Table[] = {
    0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005, 0x2608edb8,
    0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
    0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75, 0x6a1936c8, 0x6ed82b7f, 0x639b0da6,
    0x675a1011, 0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
    0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81, 0xad2f2d84,
    0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d, 0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb,
    0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1, 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a,
    0xec7dd02d, 0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
    0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca, 0x7897ab07,
    0x7c56b6b0, 0x71159069, 0x75d48dde, 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,
    0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba, 0xaca5c697, 0xa864db20, 0xa527fdf9,
    0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
    0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e, 0xf3b06b3b,
    0xf771768c, 0xfa325055, 0xfef34de2, 0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,
    0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637, 0x7a089632, 0x7ec98b85, 0x738aad5c,
    0x774bb0eb, 0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
    0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b, 0x0315d626,
    0x07d4cb91, 0x0a97ed48, 0x0e56f0ff, 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9,
    0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b, 0xd727bbb6, 0xd3e6a601, 0xdea580d8,
    0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
    0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f, 0x8832161a,
    0x8cf30bad, 0x81b02d74, 0x857130c3, 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2,
    0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8, 0x68860bfd, 0x6c47164a, 0x61043093,
    0x65c52d24, 0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
    0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654, 0xc5a92679,
    0xc1683bce, 0xcc2b1d17, 0xc8ea00a0, 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676,
    0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4, 0x89b8fd09, 0x8d79e0be, 0x803ac667,
    0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
    0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
};

////////////////////////////////////////////////////////////////////////////////
// Code
////////////////////////////////////////////////////////////////////////////////

// initialize the members of the allocated crc32_data_t struct
void crc32_init(crc32_data_t *crc32Config)
{
    // initialize running crc and byte count
    crc32Config->currentCrc = 0xFFFFFFFF;
    crc32Config->byteCountCrc = 0;
}

// "running" crc32 calculation
void crc32_update(crc32_data_t *crc32Config, const uint8_t *src, uint32_t lengthInBytes)
{
    assert(src);
    uint32_t crc = crc32Config->currentCrc;
    crc32Config->byteCountCrc += lengthInBytes;

    while (lengthInBytes--)
    {
        uint8_t c = *src++ & 0xff;
        crc = (crc << 8) ^ s_crc32Table[(crc >> 24) ^ c];
    }

    crc32Config->currentCrc = crc;
}

// finalize the crc32 calculation for non-word-aligned counts
void crc32_finalize(crc32_data_t *crc32Config, uint32_t *hash)
{
    uint32_t crc = crc32Config->currentCrc;
    uint32_t byteCount = crc32Config->byteCountCrc;

    // pad with zeroes
    if (byteCount % 4)
    {
        uint32_t i;
        for (i = byteCount % 4; i < 4; i++)
        {
            crc = (crc << 8) ^ s_crc32Table[(crc >> 24) ^ 0];
        }
    }

    crc32Config->currentCrc = crc;

    *hash = crc32Config->currentCrc;
}
#endif
////////////////////////////////////////////////////////////////////////////////
// EOF
////////////////////////////////////////////////////////////////////////////////
